Ferrocenyl bisoxazoline as an efficient non‐phosphorus ligand for palladium‐catalyzed copper‐free Sonogashira reaction in aqueous solution
作者:Shuyan Yu、Jingxin Wu、Xinwei He、Yongjia Shang
DOI:10.1002/aoc.4156
日期:2018.3
coupling reactions of alkynes and a variety of aryl halides with 1,3‐bis(5‐ferrocenylisoxazoline‐3‐yl)benzene as an efficient non‐phosphorusligand under copper‐free conditions are presented. The main advantages over previous methodologies include low catalyst loading (0.2 mol% Pd(OAc)2 and 0.4 mol% ferrocenyl bisoxazoline ligand are sufficient for these coupling reactions), less problematic reaction medium